package com.fan.filter;

import com.fan.pojo.User;
import com.fan.util.Constants;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class SysFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }

    @Override
    public void destroy() {
    }

    @Override
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)req;
        HttpServletResponse response = (HttpServletResponse)resp;
        User user = (User) request.getSession().getAttribute(Constants.USER_SESSION);
        if (user==null){
            response.sendRedirect("/error.jsp");
        }else {
            filterChain.doFilter(request,response);
        }

    }
}





























